ANSWER:
You are doing all of this over such a trivial issue?
What kind of a husband are you?
It is wrong from her side to cut her hair agains your wish but it seems that you have a problem! It seems that the hair you saw was not so much as you couldn’t tell from the way she looks but rather from the traces of hair you found! She might have just fixed it or trimmed it so that it would look even or presentable!